Question

A conducting circular loop is placed in a magnetic field which is directed perpendicular to the paper inwards. If the magnetic field increases with time, then the direction of induced electric field is -

• A. clockwise.
• B. anticlockwise.
• C. no electric field is induced.
• D. clockwise in upper half and anticlockwise in lower half.

Answer 1

The correct option is B anticlockwise.

As the magnetic field is increasing, from Lenz's law, the induced current will be in anticlockwise direction.

This induced current is driven by induced electric field.

As the free electrons moves opposite to the direction of induced electric field, the induced current is in the direction of induced electric field.

Therefore, the induced electric field is in anticlockwise direction.

Hence, option $\left(B\right)$ is the correct answer.